Magnetic noise in a low-power picotesla magnetoresistive sensor

Sy-Hwang Liou, David J Sellmyer, Stephen E. Russek, Ranko Heindl, F. C S Da Silva, John Moreland, David P. Pappas, L. Yuan, J. Shen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

We present a design of a low power, compact, magnetoresistive sensor. The key features of the design are (1) decreasing the noise by the use of a 64 element magnetic tunnel junction (MTJ) bridge, (2) reducing the magnetic noise by annealing of the MTJ sensors in high magnetic field and a hydrogen environment, and (3) increasing the signal by the use of external low-noise magnetic flux concentrators. The field noise of our prototype magnetic sensor is approximately 4.5 pT/Hz1/2 at 1 kHz, and 222 pT/Hz1/2 at 1 Hz at room temperature. The magnetic sensor dissipates about 2 mW of power while operating at an applied voltage of 2 V.

Original languageEnglish (US)
Title of host publicationIEEE Sensors 2009 Conference - SENSORS 2009
Pages1848-1851
Number of pages4
DOIs
StatePublished - Dec 1 2009
EventIEEE Sensors 2009 Conference - SENSORS 2009 - Christchurch, New Zealand
Duration: Oct 25 2009Oct 28 2009

Publication series

NameProceedings of IEEE Sensors

Other

OtherIEEE Sensors 2009 Conference - SENSORS 2009
CountryNew Zealand
CityChristchurch
Period10/25/0910/28/09

Fingerprint

Magnetic sensors
Tunnel junctions
Sensors
Magnetic flux
Annealing
Magnetic fields
Hydrogen
Electric potential
Temperature

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Liou, S-H., Sellmyer, D. J., Russek, S. E., Heindl, R., Da Silva, F. C. S., Moreland, J., ... Shen, J. (2009). Magnetic noise in a low-power picotesla magnetoresistive sensor. In IEEE Sensors 2009 Conference - SENSORS 2009 (pp. 1848-1851). [5398414] (Proceedings of IEEE Sensors). https://doi.org/10.1109/ICSENS.2009.5398414

Magnetic noise in a low-power picotesla magnetoresistive sensor. / Liou, Sy-Hwang; Sellmyer, David J; Russek, Stephen E.; Heindl, Ranko; Da Silva, F. C S; Moreland, John; Pappas, David P.; Yuan, L.; Shen, J.

IEEE Sensors 2009 Conference - SENSORS 2009. 2009. p. 1848-1851 5398414 (Proceedings of IEEE Sensors).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Liou, S-H, Sellmyer, DJ, Russek, SE, Heindl, R, Da Silva, FCS, Moreland, J, Pappas, DP, Yuan, L & Shen, J 2009, Magnetic noise in a low-power picotesla magnetoresistive sensor. in IEEE Sensors 2009 Conference - SENSORS 2009., 5398414, Proceedings of IEEE Sensors, pp. 1848-1851, IEEE Sensors 2009 Conference - SENSORS 2009, Christchurch, New Zealand, 10/25/09. https://doi.org/10.1109/ICSENS.2009.5398414
Liou S-H, Sellmyer DJ, Russek SE, Heindl R, Da Silva FCS, Moreland J et al. Magnetic noise in a low-power picotesla magnetoresistive sensor. In IEEE Sensors 2009 Conference - SENSORS 2009. 2009. p. 1848-1851. 5398414. (Proceedings of IEEE Sensors). https://doi.org/10.1109/ICSENS.2009.5398414
Liou, Sy-Hwang ; Sellmyer, David J ; Russek, Stephen E. ; Heindl, Ranko ; Da Silva, F. C S ; Moreland, John ; Pappas, David P. ; Yuan, L. ; Shen, J. / Magnetic noise in a low-power picotesla magnetoresistive sensor. IEEE Sensors 2009 Conference - SENSORS 2009. 2009. pp. 1848-1851 (Proceedings of IEEE Sensors).
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